Expanded metal lath



Nov. 11, 1930. w. G. HURLBERT, JR., ET AL 1,781,012

EXPANDED METAL LATH Filed March 51, 1927 2 Sheets-Sheet 1 Elma l. INVENTORS BY 131m 1 won;

Um ATTORNEYS Nov. 11, 1930. w. G. HU RLBl ERT. JR., E AL 1,781,012

EXPANDED METAL LATH Filed March 31, 1927 2 Sheets-Sheet 2 INVENTORS M ATTORNEYS Patented Nov; 11, 1930 UNITED STATES WI LIAM G. HUBLBERT, an 'nivn ELMER E. MARSHMAm F-WARREN, 01110 EXPANDED MnrAn LATE 1 Application filed March 31; 1927. Serial no. 179,852.

Our invention is an improvementin expanded sheet metal such as expanded metal lath, expanded corner beads, expanded metal. casings,,expanded interior metal trim, and

the like.

An object of our invention is to provide a sheet metal structure, having an interme diate unexpanded portion and uniformly expanded side portions.

Another object of our inventionis to construct metal lath or like structure having its side edges formedto prevent cracking of the plaster bonding an edge of said lath with adjacent edges or an adjacent lath or like structure. 7

Another object of our invention is to pro- Vide a sheet metal structure, having a portion expanded uniformly in the direction of its width andcapable of receiving and support ing material such as plaster without danger 1 ,7 V

' terlal employed to secure ad acent, laths in of such material cracking or becoming loose our invention.

V of the body being expanded in the direction and falling from the lath.

Other objects of our invention will become more apparent as the following description of several embodiments thereof progresses,

reference being made to the accompanying drawings in which like reference characters are employed to designate like parts throughout the same.

- Figs. 1 and 2 are fragmentary sectional views, showing manners of joining adjacent sheets of lath. i

Fig. 3 is a plan view of an embodiment of Fig. 4 is a transverse section thereof on line Figs.-5 and 6 are fragmentary sectional views, showing manners of joining adjacent Fig. 8 is a transverse section thereof on the p I I 1 plng area for the plaster about the overlapline 88.

In carrying out our invention we construct a lath comprising a body of suitable material,

preferably sheet metal, one or more portions of the width of the lath. I

Referring to Figs. 3, 4, 5 and 6, of the drawings which illustrate an embodiment of overlapping edge toedge relation.

our invention, the lath may be constructed of a: sheet of suitable metal comprising a body perforatedor slotted longitudinally at intervals as at 77 and 88', the metal between U shape cross section. This is'illustrated in Fig.4 at 11. Longitudinalreinforcing ribs;

' l may be provided between adjacent rows of truss loops as shown. I Openings12 are provided and are bridged longitudinally by the truss loops 9'and 10. The truss-loopsof each row are preferably arranged in longitudinal allgmnent and are preferably staggered relaillustrated in Fig. 3. I o i/Ve have provided .means I for preventing cracking of the plasterer other bonding mas Such means may consist in forming the metal along the edges ofthe laths to permit plaster, applied to'the overlapping edges, to effectively grip and bond these overlapping edges together over substantially their entire. ex panded area. i i

' One manner of formingv the-metal along the edgesofthe lath may consist in uniformly expanding the said'met al in the direction of the width of the lath, such expansion being accomplished by formingl'substantially parallel rows of slits 13 in the metal adj acentthe edge, the slits extending substantially'paral- 3 lel to the side edges of the lath,.and stretching and distorting the metal on one side of each of the: slits. The rows of slits are arranged preferably in staggered relation. In this manner a portion of the plaster is permitted to key through the slits in the respective lath edges and interlock therewith. The griptive to the truss-loops of adjacent' rows. as

ping edges is thus-materially increased and is distributed uniformly, so that cracking of the plaster about the joint is prevented.

We may 1 provide additional means for binding or securing the adjacent edges of the Then the adjacent edges of the latlimay be 'secured together in non-overlapping relation,

the laths lying-in substantially the same plane. When the laths-areconnected in this manner andplaster is applied the'vvire loops '14 serve as a reinforcement for the plaster I and prevent its eraiekingaboutstljiejoint.

Referring to Figs. 7 8,- 1 and 2, We -have illustrated another modification of our inven-V 7 tion which is similar in some'respects to that j form' shot'vnin Figs. 3," 4, 5, and" 6: However,

it Will be noted that in the present embodiment We'ha've formed the erforated'pon tion' of the lath by slitting the same longitudinally at intervals as at vand crimp the i metal intermediate adj acent the. slits-to 'form 'tmss loops 21..- Theloops' thus formed are f Larrangedin rows 'the loops. of one row being 7 .ppreferablysin stagger-ed relationto'the loops ;a$ o1of-adj;aoent rows. The metal intermediate Feachfrowiis ribbedil'ongitudinally 'asiat, 22.

V lnt'his formofourinventiongwe' form the it-russ l'oops.by slitting the body of the. lath. rlongitudin ally in siibst an tially parallel rows '1.gs fl randithen'erimpingonbending themetal betweeni the respective slits of certalnof the --i"ows s'o 'thaty-theedges of the loops 24: extend outvv'ardlybf the loops,*vvhile theintermediateiportionsfid are slightly conceived;

1' We? have also provided means forprevent- I cracking of ithe plaster or other bonding v I material yemploryedz to' 'secu-re adjacent l-aths in overlapped -edgetoed-gez relation. Such meansis similar to that described in; connec? etion r withzthe embodiment illustrated in Figs. anclg63iancl consistsinslitting the metal ll; I 7 centkthe. edges of the lath-as at 26theslits flbie-in arranged'in longitudinal rows, While xthe sli'ts of: one: row are'prefera-bl-y staggered V iyw-With respect=to' slits-of adjacent rows. The

' metal on one side 20f each slit is distorted as at QZitolaterally I longitudinaledges of the lath.

; mlthough J'We" have shown I and described herein. certain of the ribs :4? "and 22eformed 'ad- F iaeentstheeexpandedledge. portions' of there- .f 'ispeetive'lathmit isito' beiunderstoodthat'izve =may dispenser'vvith'those-i ibsadjacent-the-exl I pended ipoftiions, and may'fo'rm; the truss V l loopsad iacent theseedges'wlthjno; 1nterven- V a-rious eh'anges'may be-madeiin details v f o'fconstruction ofour invention WltlIQHt'dG- I a rp artin gthe'spirit; of the invention or thescopeoflthe subjoinedclaims; V I

-;Whae e c1aimis:- Y Anew-1 "lath-including a body having intermediate 1per-forated portion :and expanded'edge portions; said intermediate por- 7 m tion' haviing: "pairs of' openings therein aree-farmed ofjtlie plane of the body, 4 said -;-'del ofir'i ed 'portions being "of'a substa riti al -'c5 eilrvielinean'transverse section. Q

of epenings expand the metal alongthe 'longitndinal parallel rows, thep'ortions between each: pair of openings being 2. A metal lath including a body having an intermediate perforated portion and expanded'edge portions, saidintermediate portion having pairs of openings therein'arranged in'long'itudi'nal parallel rows, the

portions between each pair of openings being openings.

Arman nah including a" body having an, intermediate;perforated portion and ex-' panded edge portions, said intermediate portionhavingf pairs of openingsz therein ar deformed: out of the-planeof' theybo'dy said 1 defdrmed-" pdrtions of a="substantial curvi-linear transverse section; and longitudinal ribs separating oneof the parallel rows fronifadjac'ent par'alie'lfl'rovvs ofrangedinlongitudinalparallel rovvsjthe'pori tions between each pair' of: openings being. d'eformed out'ofath'ep'lane oftthe body andibe- -i 7 .ing deformed to a greater extent at the edges ir" =th'anl at its intermediate portion ,1 the -lo ngitndinalfedges' of thel ath' beingi slitted and "expanded late'rally. a j

41-. A metal lath including a bo dyhaving an intermediate perforated portion? and 'exp'an'ded edgeiportions, said intermediate porerally.

tions.

I 61 A metal! 'lathcomprisingia an annex-paneled "&central "portion, perforated and uniformly expanded marginalzportions,

-said: iunexpandediioentral;portion "having .a

longitudinal reenforcing rib disposeduwithin .the!horizontal'planesbounding the expanded portions.

metal-1 I p ISO g 51- A?inetalrlathcomprisinga body.-having v an unexpanded eentr ali pOltlO11,f perforated and expanded marginal portions; saidnn'ex" 1 pan'ded central, portion having. a "longitndianal reenforeing rib disposed Within;=- thev horizontaljzpla'nesfboundingthe, expanded, por-' ingfaaperforwtedunexpandediwoentral portion, perforated and expanded marginaL- o W t1ons;:4longitnd1na1 'reenforcing ribs insaid""- central portion, said/ ribs being disposed within the horizontal: plane 1 bounding the I crest of the expanded marginal portions) 7 8'. metal lath comprising a body halving a perforated-'- nnexpanded "central; portion5"" longitudinal reenfoneing ribsi-in said- -por- 'tionyniarg'inal perforated. portions distorted and constituting openz mesh worhsaid longi-' tudiaz ali ribslying.,-a medial} planewof 'said j 'lOPBIl Ii'ISllWOIk.

9. A metal lath comprising a body having a perforated unexpanded central portion,

longitudinal reenforcing ribs in said portion, marginal perforated portions distorted uniformly and constituting open meshwork, said longitudinal ribs lying in a medial plane of said open meshwork.

10. A metal lath including a body havlng a central perforated portion and perforated and expanded edge portions, said central portion having pairs of openings therein arranged in longitudinal rows, the portions between each pair of openings being deformed out of the plane of the body, the deformed portions being of a substantial arcuate transverse section.

11. A metal lath including a body having a central perforated portion and perforated and expanded edge portions, said central portion having pairs of openings therein arranged in longitudinal rows, the portions between each pair of openings being deformed out of the plane of the body, the deformed portions being of a substantial arcuate trans verse section, and longitudinal ribs disposed in spaced relation with the said parallel rows of openings.

12. A metal lath including a body having a central perforated portion and perforated expanded edge portions, the central portion having portions arranged in parallel rows deformed out of the plane of the body, said deformed portions having an arcuated crest with divergent sides, defining pairs of openings and longitudinal ribs interjacent the said rows of deformations.

In testimony whereof we hereunto affix our signatures this 1st day of March, 1927. WILLIAM G. HURLBERT, JR. ELMER E. MARSHMAN. 

